The MAQ20 thermocouple modules employ an advanced method of cold junction compensation (CJC) to significantly boost accuracy over comparable units. The MAQ20-JTC, -KTC, -TTC, and -RSTC thermocouple-input modules have eight differential input channels, grouped into four blocks of two channels. Each block has a terminal for sensor shield ground as well as an ambient temperature sensor. Operating temperature range is -40°C to +85°C. CJC specs include ±0.25°C typical accuracy at 25°C ambient and ±1.0°C typical accuracy over -40°C to +85°C ambient.
CJC Method Significantly Improves Thermocouple Accuracy